三维花状铜基复合物及其低温煅烧衍生物用于高效析氧反应
A three-dimensional flower-like Cu-based composite and its low-temperature calcination derivatives for efficient oxygen evolution reaction
刘逸帆 1张沾 1朱荣妹 1邱紫铭 1庞欢1
作者信息
- 1. 扬州大学化学化工学院,扬州 225009
- 折叠
摘要
采用一种简单易行的方法来制备铜基电化学催化剂,该催化剂用于析氧反应.利用沸石咪唑酯骨架-67(ZIF-67)为前驱体,通过铜离子刻蚀合成新型铜基复合物(命名为Cu-NF).它具有特殊的三维花状形貌和中孔结构,其形貌受铜离子与ZIF-67的质量比的影响.随后,Cu-NF经过低温煅烧处理,得到了不同温度下的衍生物,而煅烧过程并未改变其原始形貌.煅烧温度决定了活性物种的组成及含量,并增强了材料的多孔性.其中,300℃煅烧得到的产物Cu-NF-300具有最好的析氧反应性能:在1.0 mol·L-1 KOH溶液中,过电位低达347 mV,塔菲尔斜率为93 mV·dec-1.该材料电化学性能的提高归因于其三维结构以及低温煅烧所带来的活化作用.
Abstract
A novel Cu-based composite with unique three-dimensional(3D)nanoflower-like morphology and meso-porous structure(abbreviated as Cu-NF)was developed,using zeolitic imidazolate framework-67(ZIF-67)as precur-sor via facile Cu ion etching,followed by low-temperature calcination strategy.The mass ratio of Cu2+to ZIF-67 played a key role in morphology control.Additionally,low-temperature calcination changed the chemical compo-nents of the active sites and improved the porosity for mass transportation with the original morphology preserved.Sample Cu-NF-300,calcined at 300℃displayed the best oxygen evolution reaction(OER)performance among all the samples,with a small overpotential of 347 mV in 1.0 mol·L-1 KOH and a low Tafel slope of 93 mV·dec-1 for OER.Significant improvement in the electrochemical activity is attributed to the 3D superstructure and low-temperature calcination activation,which offer a simple synthetic strategy for the fabrication of Cu-based electrocat-alysts for OER.
关键词
三维结构/铜基纳米材料/简单的合成方法/低温煅烧/析氧反应Key words
three-dimensional morphology/Cu-based nanocomposite/facile synthesis/low-temperature calcination/oxygen evolution reaction引用本文复制引用
基金项目
国家自然科学基金(U1904215)
江苏省省自然科学基金(BK20200044)
江苏省双创计划(202030974)
扬州市绿扬金凤基金(YZLYJF2020PHD110)
出版年
2024
NETL
NSTL
维普
万方数据